Valve assembly

A valve assembly, comprising:

• a valve housing body extending along a longitudinal axis X between a first end and a second end and defining a cylindrical passage therethrough from the first end to the second end;
• a fluid inlet at the first end for receiving a pressurized fluid;
• a fluid outlet provided in between the first and second end of the housing body;
• and
• a piston provided in the cylindrical passage, the piston being axially movable between a first position where the fluid outlet is blocked by the piston such that the piston blocks the flow of fluid from the inlet to the outlet, and a second position where the fluid outlet is not blocked by the piston and a fluid flow path is formed from the fluid inlet to the fluid outlet,
• wherein the valve assembly further comprises a helical guide groove formed in the cylindrical passage and the piston comprises radially extending guide pins configured to engage in the helical guide groove such that as the piston moves axially from the first position, the guide pins travel along the helical guide groove to cause rotation of the piston relative to the housing body, and
• wherein the valve assembly further comprises a circumferential groove at an end of the helical guide grooves such that the guide pins travel from the helical guide grooves into the circumferential groove, wherein when the piston is in the second position the guide pins rotate around the circumferential groove.